Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 20 Sep 2002 11:21:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 20 Sep 2002 11:21:20 -0400 Received: from probity.mcc.ac.uk ([130.88.200.94]:46600 "EHLO probity.mcc.ac.uk") by vger.kernel.org with ESMTP id ; Fri, 20 Sep 2002 11:21:19 -0400 Date: Fri, 20 Sep 2002 16:26:18 +0100 From: John Levon To: linux-kernel@vger.kernel.org Subject: Re: do_gettimeofday vs. rdtsc in the scheduler Message-ID: <20020920152618.GA90329@compsoc.man.ac.uk> References: <1032305535.7481.204.camel@cog> <20020917.163246.113965700.davem@redhat.com> <20020918015209.B31263@wotan.suse.de> <20020917.164649.110499262.davem@redhat.com> <20020918015838.A6684@wotan.suse.de> <15753.45833.702405.2357@kim.it.uu.se> <1032442039.26712.32.camel@irongate.swansea.linux.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1032442039.26712.32.camel@irongate.swansea.linux.org.uk> User-Agent: Mutt/1.3.25i X-Url: http://www.movementarian.org/ X-Record: Mr. Scruff - Trouser Jazz X-Scanner: exiscan *17sPff-000BUN-00*tkzY24urOBQ* (Manchester Computing, University of Manchester) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 783 Lines: 20 On Thu, Sep 19, 2002 at 02:27:19PM +0100, Alan Cox wrote: > > - There are plenty of laptops whose CPUs have local APICs but whose > > BIOSen go berserk if you enable it. There are also plenty of laptops > > Frequently because we don't disable it again before any APM calls I > suspect. When a CPU goes into sleep mode you must disable PMC and local > apic timer interrupts. Isn't this exactly what apic_pm_suspend() does ? Or is that in 2.5 only ? regards john -- Support the project - http://www.gtonline.net/private/mapp/project/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/